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Two new glycosides from the florets of Carthamus tinctorius.

Journal of Asian natural products research (2013-04-23)
Jian-Shuang Jiang, Zhong Chen, Ya-Nan Yang, Zi-Ming Feng, Pei-Cheng Zhang
ABSTRACT

Two new glycoside compounds, named saffloquinoside C (1) and (-)-4-hydroxybenzoic acid-4-O-[6'-O-(2″-methylbutyryl)-β-D-glucopyranoside] (2), were isolated from the florets of Carthamus tinctorius. Their structures were elucidated by detailed spectroscopic means including UV, IR, HR-ESI-MS, 1D and 2D NMR, and CD data. Compound 1 was a rare quinochalcone glycoside with six five-membered dioxaspirocycle.

MATERIALS
Product Number
Brand
Product Description

Supelco
Sodium 4-hydroxybenzoate, analytical standard
Supelco
4-Hydroxybenzoic acid, Pharmaceutical Secondary Standard; Certified Reference Material
Sigma-Aldrich
4-Hydroxybenzoic acid, ReagentPlus®, ≥99%
Sigma-Aldrich
4-Hydroxybenzoic acid, ReagentPlus®, 99%